2220121001000 has 128 divisors (see below), whose sum is σ = 6286487500800. Its totient is φ = 716408755200.

The previous prime is 2220121000931. The next prime is 2220121001009. The reversal of 2220121001000 is 1001210222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2220121001009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9209240 + ... + 9447239.

It is an arithmetic number, because the mean of its divisors is an integer number (49113183600).

Almost surely, 2^{2220121001000} is an apocalyptic number.

2220121001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220121001000 is an abundant number, since it is smaller than the sum of its proper divisors (4066366499800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2220121001000 is a wasteful number, since it uses less digits than its factorization.

2220121001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18656524 (or 18656510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2220121001000 its reverse (1001210222), we get a palindrome (2221122211222).

The spelling of 2220121001000 in words is "two trillion, two hundred twenty billion, one hundred twenty-one million, one thousand".